A lens manufactured in France in 1902 is shining high atop Montauk Point Lighthouse once again. Earlier this month the U.S. Coast Guard relit the clamshell-shaped Fresnel lens, which guided ...

A view from inside the antique Fresnel lens at Graves Light with Bobby Sager and Dave Waller, the co-owners of Graves Light. David L. Ryan/Globe Staff Emily Sweeney can be reached at emily.sweeney ...

The picturesque lighthouse near the East Bay Bike Path was abandoned for decades, but has been meticulously restored to its ...

The first order lens, meant for use in coastal lighthouses, was the largest and the strongest lens. The sixth order lens was the smallest, designed for use in small harbors and ports. By the 1860s, ...

The lens, developed by French physicist and engineer Augustin-Jean Fresnel, later was installed in the Belle Isle Lighthouse, a square, red-brick tower with an attached two-story brick building.

Fresnel lenses are often used with classic lighthouse lamps due to their ability to diffract light across large distances. [Related: NASA’s next massive telescope could have a liquid lens.] ...

Nov. 26—Port Isabel's lighthouse is an impressive sight, an historical treasure and a big tourist draw, though for the last 117 years it's been missing a key component: light. Technically, a ...

The light from the Fresnel lens is replacing the automated beacon used for many years at Point Wilson. The free event, which will include tours of the lighthouse, live music, food and drink vendors ...

The unique history of the Crooked River Lighthouse’s lens in Carrabelle, Florida. The Crooked River Lighthouse’s Executive Director, Steve Allen, shares with us the unique qualities of the ...